Add palette tool/manager.

ash/common/system/chromeos/palette/palette_tool.cc

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "ash/common/system/chromeos/palette/palette_tool.h"
+
+#include "ash/common/shelf/shelf_constants.h"
+#include "ash/common/system/chromeos/palette/palette_ids.h"
+#include "ash/common/system/chromeos/palette/palette_tool_manager.h"
+#include "ash/common/system/tray/hover_highlight_view.h"
+#include "ash/common/system/tray/view_click_listener.h"
+#include "base/strings/utf_string_conversions.h"
+#include "grit/ash_resources.h"
+#include "ui/base/resource/resource_bundle.h"
+#include "ui/gfx/paint_vector_icon.h"
+#include "ui/gfx/vector_icons_public.h"

[oshima, 2016/07/14 13:58:32]

Looks like not all headers are necessary?

[jdufault, 2016/07/18 20:39:57]

Done, these are used in a dependent CL so I've moved them to that CL.

+
+namespace ash {
+
+// static
+void PaletteTool::RegisterToolInstances(PaletteToolManager* tool_manager) {}

[oshima, 2016/07/14 13:58:32]

what is this for? or add TODO?

[jdufault, 2016/07/18 20:39:57]

Added a comment.

+
+PaletteTool::PaletteTool() {}
+
+PaletteTool::~PaletteTool() {}
+
+void PaletteTool::Initialize(WmWindow* window,
+                             const ToolAction& enable_tool,
+                             const ToolAction& disable_tool) {
+  window_ = window;
+  enable_tool_ = enable_tool;
+  disable_tool_ = disable_tool;

[oshima, 2016/07/14 13:58:32]

in initializer list?

[jdufault, 2016/07/18 20:39:57]

Not a constructor :(

+}
+
+void PaletteTool::OnEnable() {
+  enabled_ = true;
+}
+
+void PaletteTool::OnDisable() {
+  enabled_ = false;
+}
+
+bool PaletteTool::enabled() const {
+  return enabled_;

[oshima, 2016/07/14 13:58:32]

you may inline this.

[jdufault, 2016/07/18 20:39:57]

Done.

+}
+
+void PaletteTool::EnableSelf() {
+  DCHECK(!enable_tool_.is_null()) << "PaletteTool was not initialized";
+
+  enable_tool_.Run(tool_id());
+}
+
+void PaletteTool::DisableSelf() {
+  DCHECK(!disable_tool_.is_null()) << "PaletteTool was not initialized";
+
+  disable_tool_.Run(tool_id());
+}
+
+WmWindow* PaletteTool::window() const {
+  return window_;
+}

[oshima, 2016/07/14 13:58:32]

this too

[jdufault, 2016/07/18 20:39:57]

Done.

+
+}  // namespace ash